﻿// Copyright 2005, 2006 - Morten Nielsen (www.iter.dk)
//
// This file is part of SharpMap.
// SharpMap is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// SharpMap is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public License
// along with SharpMap; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

using System;
using System.Collections.Generic;
using System.Text;

namespace Petra.Gis.ReferenceSystemServices
{
  /// <summary>
  /// Definition of angular units.
  /// </summary>
  public class AngularUnit : SpatialUnit
  {

    /// <summary>
    /// xaml constructor
    /// </summary>
    public AngularUnit() { }


    /// <summary>
    /// Initializes a new instance of a angular unit
    /// </summary>
    /// <param name="radiansPerUnit">Radians per unit</param>
    /// <param name="metadata">unit metadata</param>
    public AngularUnit(double radiansPerUnit, Metadata metadata)
      : base(metadata)
    {
      _RadiansPerUnit = radiansPerUnit;
    }


    #region AngularUnit Members

    protected double _RadiansPerUnit;

    /// <summary>
    /// Gets or sets the number of radians per <see cref="AngularUnit"/>.
    /// </summary>
    public double RadiansPerUnit
    {
      get { return _RadiansPerUnit; }
      set { _RadiansPerUnit = value; }
    }


    #endregion

    /// <summary>
    /// Checks whether the values of this instance is equal to the values of another instance.
    /// Only parameters used for coordinate system are used for comparison.
    /// Name, abbreviation, authority, alias and remarks are ignored in the comparison.
    /// </summary>
    /// <param name="obj"></param>
    /// <returns>True if equal</returns>
    public override bool EqualParams(object obj)
    {
      if (!(obj is AngularUnit))
        return false;
      return (obj as AngularUnit).RadiansPerUnit == this.RadiansPerUnit;
    }
  }
}
